[OOB] Upgrades 'flex' to '2.2.0'

[SvcGitHubPATagentoperatorimages]

Automated OOB update requested by SvcGitHubPATagentoperatorimages.

Agent: flex
Version: 2.1.0 -> 2.2.0

[github-actions]

Images built:

dotnet: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet@sha256:ff9be20f95a1d1acb815cffba9dfc664d5261db6d98f465886857fc087816007
dotnet-core: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-core@sha256:6e80e81014e0223ca46367957975aeaa5444c27c39e197048620d2526ea95142
dotnet-framework: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-framework@sha256:e2f2f234f8e7cbbead5efd189dbd863accc3a382292f1b37bff55ea8579efe16
java: ghcr.io/contrast-security-oss/agent-operator-images/agent-java@sha256:1c96dc5474ca3c8cc4584a9ad83598808a2059b1b5dbf2008cd3d51a8a95d3c1
nodejs: ghcr.io/contrast-security-oss/agent-operator-images/agent-nodejs@sha256:5fa403280a849fb676d842473de5bc0ea1707611b568ff6314f20c87c960d87b
php: ghcr.io/contrast-security-oss/agent-operator-images/agent-php@sha256:8110f062a5d0a2ce27de539cf41e8f4240f42db1bc79f2b93c3f86e5ca2e9fb3
python: ghcr.io/contrast-security-oss/agent-operator-images/agent-python@sha256:0a8fc6d85aa921a5ed10dd7a9ffde2a572cc5332121a24029c5c2dcc9f6daa75
flex: ghcr.io/contrast-security-oss/agent-operator-images/agent-flex@sha256:9b963df127b4b8624338830b304a6483bc0e99bd3ebb92bed9767c3a588b9df2